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Help Understanding Alignment Specs


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Would someone help me understand the values for how toe is measured. I understand that toe out has the front of the tire pointing outward and toe-in pointing to the center line of car.

I see a lot of discussing about having like 1/32 or 1/16 toe to provide more crisp turnin? and total toe. I'm not sure how that relates to the figures below from the Porsche Repair Maual where they show +5' +- 5'. Can someone tell me what the 1/32 or 1/16 might relate to on a machine which measures angles?

From the Porsche Specs

Porsche Repair Manual Wheel alignment Values

Turbo USA TurboRoW Turbo X73 GT2

Front axle

Toe unpressed (total) + 5' ± 5' + 5' ± 5' + 5' ± 5' + 8' ± 2'

Toe difference angle at 20° lock − 1° 20' ± 30' − 1° 50' ± 30' − 1° 50' ± 30' − 1° 50' ±30’

Camber (with wheels in straight−ahead 0° ± 15' − 30' ± 15' − 45' ± 15' − 1° ± 5'

position)

max. difference, left to right 20' 20' 20' 10'

Caster 8° ± 30' 8° ± 30' 8° ± 30' 8° ± 30'

max. difference, left to right 40' 40' 40' 40'

Rear axle

Toe per wheel + 10' ± 5' + 10' ± 5' + 10' ± 5' + 13' ± 2'

max. difference, left to right 10' 10' 10' 5'

Camber − 1° 25' ± 15' − 1° 25' ± 15' − 1° 40' ± 15' − 1° 50' ±

Another bit of confusion for me is that the front TOE In values for US Turbo are +5' while the GT2 values are +8'. I would have thought that the larger value of positive toe in would have been less agressive? I understood the closer to neutral or negative (Toe Out) the more agressive the turnin and darty nature.

Getting an alignment next week so thanks for the insights.

Keith

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